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The Dell Latitude C-640 has HI-SPEED USB2 compliant hardware, but often driver problems cause the error "HI-SPEED USB Device Attached To non-HI-SPEED Hub".

This is not easy to fix (I'm still fighting it myself) but supposedly some of these websites can help:

How_do_you_download_a_hi-speed_USB_host_controller

http://support.microsoft.com/default.aspx?scid=kb;en-us;329632

http://support.dell.com/support/downloads/driverslist.aspx?os=WW1&osl=EN&catid=-1&impid=-1&servicetag=&SystemID=LAT_PNT_P4N_C640&hidos=WW1&hidlang=en

http://www.Google.com/search?hl=xx-hacker&q=%22HI-SPEED+USB+Device+Attached+To+non-HI-SPEED+Hub%22+&btnG=Google+s3a%7C2ch

good luck :)

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16y ago
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Q: How do you upgrade your USB Root Hub 1to USB Root Hub Ver 2 on your dell latitude c640 laptop?
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